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Jurors began deliberations Friday over whether former IRS law enforcement officer Brendan Banfield plotted with his family’s Brazilian au pair and lover to kill his wife, murder a stranger and disguise the deaths as a violent home invasion.
Prosecutors allege Banfield and Juliana Magalhães spent months planning the Feb. 24, 2023, killings so they could pursue their relationship. Banfield denied any conspiracy and testified that he shot the stranger, Joe Ryan, to stop Ryan from stabbing his wife.
Christine Banfield, a pediatric intensive care nurse, suffered fatal stab wounds to her neck. Both sides agree that Banfield and Magalhães shot Ryan inside the family’s home.
Magalhães, the prosecution’s central witness, testified that she and Banfield created an account in Christine Banfield’s name on a fetish-oriented social media platform. She said they used it to entice Ryan to the home for a sexual encounter involving a knife, then staged the scene to make it appear that Ryan was an attacker stabbing Christine Banfield.
Banfield told jurors there was no such plan. He also testified that he and his wife had each been unfaithful during their 19-year relationship but chose during couples therapy to remain married.
If convicted of the murders, Banfield could receive life in prison. He also faces child abuse and felony child cruelty charges because his daughter, then 4 years old, was in the basement when the killings occurred.
Competing Accounts in Closing Arguments
During Friday’s closing arguments, prosecutor Jenna Sands said the case did not depend entirely on Magalhães’ account. She pointed jurors to what she described as extensive supporting evidence, including expert testimony about bloodstains on Ryan’s hands.
A prosecution expert said the pattern suggested Christine Banfield’s blood dripped onto Ryan from above. Defense attorney John Carroll presented another blood expert who found the evidence inconclusive.
Carroll called the prosecution’s account a “fantastic story” and argued that police leaders settled too quickly on the theory that Banfield had used a false online identity to lure Ryan. The defense contended that investigators were pressured to support that explanation while overlooking evidence that challenged it.
The defense also portrayed Magalhães as an unreliable witness who adjusted her testimony to match the prosecution’s case and improve her chances of avoiding a long prison term. Initially charged with murder, she pleaded guilty to manslaughter in 2024 and will be sentenced after Banfield’s trial. Attorneys have said she could be released.
Forensic analysts called by the defense testified that digital evidence indicated Christine Banfield may have created the social media account and communicated with Ryan herself. The defense said a police digital forensics examiner who disputed the catfishing theory was later transferred and questioned why certain detectives did not testify.
Sands argued that device records could never conclusively establish who was operating a phone or account at a given moment. She also challenged Banfield’s credibility by citing testimony from his supervisor, who contradicted Banfield’s claim that he left home early on the day of the killings to attend an important meeting.